Sandwich-like construction of a new aminated chitosan Schiff base for efficient removal of Congo red

Abstract Herein, a novel sandwich-like α -ketoglutaric acid Schiff base-aminated chitosan composite ( -kGl-AmCsSB) was fabricated by reacting and aminated chitosan. The as-fabricated -kGl-AmCsSB inspected diversified characterization tools to determine its morphology, surface charge, chemical composition as well define the linkage pathway between -kGl AmCs. SEM images demonstrated spongy network of AmCs with interconnected pores structure which turned quite rough due free amine groups Notably, XPS FTIR spectra suggested group experimental results implied superior adsorption efficiency Congo red (CR) onto since maximum capacity q max ) reached 434.78 mg/g at 25 °C pH 3. Based on kinetics data, CR followed pseudo-second-order model. Furthermore, D-R model infers that occurred via physical interactions E value < 8 kJ/mol. recyclability test implemented for five cycles R% > 72%. More importantly, mechanism proposed discussed. Ultimately, exhibited advanced performance toward along excellent reusability. these results, we recommend more modifications exploiting remarkable advantages applying it large scale.